Get a map from any app with MappingService
Like Tim Gaden over at Hawk Wings, I too love Mac OS X's highly underrated Services menu, and Robert Stainsby has released a very handy addition to it: MappingService. This clever service allows you to select an address from any application, say a website, a document or an IM, and simply chose 'Map' from your Services menu to generate a map in any one of three mapping services: Google Maps (of course), ZoomIn Australia or ZoomIn New Zealand.
MappingService is known to work on 10.4.6 and might possibly work on earlier versions of Mac OS X. It is open source software released under the BSD license, and Robert is accepting donations for his fine work.